Free plans to a nice and large Hit n' Miss engine

[editor123]

Free plans for a large hit and miss engine. This engine was designed by one of our club members (www.baemclub.com) who passed away. His family is making the drawings available to any who want them for their own use (not for commercial resale). John Palmer is the model engineer who made the three new full-sized Wright Brothers engines for the Hiller Museum in Northern California.
http://www.baemclub.com/pages/jandejunior.html

 

[johnmcc69]

Wow! What a nice contribution from the family. It's a gorgeous engine.

The Wright engine is quite amazing, he was quite the skilled gentlemen.

John

 

[mnay]

Pass along our thanks to them.
Mike

 

[fpravenscroft]

many thanks
peter

 

[Michel_Mike_Chaput]

Thanks !

 

[hitandmissman]

Thank you so much for the plans will look forward to making this.

 

[xj35s]

I don't know if it's the free wheeling, the torque when it hits, or the simplicity of the thing in general but I love these. At the Canandaigua NY Pageant of steam There are a few go karts/ garden tractors using these engines. So cool to watch.

That wall wizard is cool too. Looks like a half VW. It would be cool on a scale ultralight RC Airplane.

 

[smiffy218]

What a project - great for when the 3 1/2" steam loco is finished (if I live that long!). Many thanks - I love these little engines.

 

[propclock]

This engine is not a "Little Engine" it is big, but runs excellent.
I have run one built by John. It could really power something.
I knew John, Miss him and am wearing one of his hats as I write this.
Thanks to the Palmer's for sharing.

 

[nel2lar]

Where do I download the plans at?
It is a very impressive engine.
Thank you
Nelson

 

[johnmcc69]

Where do I download the plans at?
It is a very impressive engine.
Thank you
Nelson

http://www.baemclub.com/pages/jandejunior.html (See link in original post)

Beautifully done drawings! Total "Blueprint Porn"...

John

 

[lennardhme]

Hi,
Thanks for the lead to the plans for this lovely machine.....very timely too.
My Son is just beginning model engineering & wants a hit & miss, so this will be a great project that we can do together, although we are 200k's apart.
cheers,
Lennard.

 

[smiffy218]

This engine is not a "Little Engine" it is big, but runs excellent.
I have run one built by John. It could really power something.
I knew John, Miss him and am wearing one of his hats as I write this.
Thanks to the Palmer's for sharing.

Ok its a big model I grant you, but of what I would call a little engine, like in this picture.

This is what I would call a "BIG" single cylinder open crank engine!

And there was me thinking everything in the US was bigger than over here!
Best wishes and happy machining!
Smiffy

 

[editor123]

12 inch flywheels. You can always scale it down (or up).

 

[vederstein]

As far as big engines go, I saw this Iron Mountian while vacationing in Wisconson last summer:

50" high pressure piston
100" low pressure piston
120" Stroke
40 ft diameter flywheel
160 tons (estimated)
11 rpm
3400 gallons of water pumped per minute

Even a 1:10 scale engine would still be pretty big. (10" LP cylinder).

...Ved.

 

[Motorteb]

Thanks for the free plans, This will be a great model to build I will print out the plans when I get back home and start building.

Leith

 

[jimsshop1]

Nice looking engine. I printed out the plans and read the building process carefully as I also thought of building it. Now, I don't think so. Some measurements left me guessing and others were not present. Also you needs some skills some builders won't have like mig welding, brazing and working with molten Babbitt. The build description is also very vague at least to me but I am not a expert builder. JMHO

Jim in Pa

 

[GRAYHIL]

Hi all
Making s half scale version from the plans and have a query.
Piston ring bore 1.86 actual dia
Piston groove bottom dia 1.75 actual dia
A clearance of .055 or .110 on dia
Is this correct or am I missing something.
Many thanks
Graham

 

[TonyM]

Piston ring bore @ 1.84 looks like the expanded size with the O/D 2.090 When compressed bore of ring is 1.84 - 090 = 1.75

 

[GRAYHIL]

Thanks TonyM
So when I rough them out I will have to make the bore smaller than 1.84 so when I compress them in the 2 inch fixture I can bore them out to 1.75 inch
Got it
Again many thanks
Graham